CN105333660B - A kind of compressor protection method of multiple on-line system - Google Patents
A kind of compressor protection method of multiple on-line system Download PDFInfo
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- CN105333660B CN105333660B CN201510754210.4A CN201510754210A CN105333660B CN 105333660 B CN105333660 B CN 105333660B CN 201510754210 A CN201510754210 A CN 201510754210A CN 105333660 B CN105333660 B CN 105333660B
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- compressor
- valve
- line system
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/05—Refrigerant levels
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to a kind of compressor protection method of multiple on-line system, including an outdoor unit and multiple indoor sets.Outdoor unit includes compressor, oil eliminator, four-way valve and the gas-liquid separator being sequentially connected；Each indoor set includes heat exchanger and the electric expansion valve of series connection with it.Magnetic valve and pressure sensor and temperature sensor are there is also mounted between compressor and oil eliminator.When the temperature and pressure detected reaches certain numerical value, control magnetic valve to open, the high-temperature gas of compressor air-discharging side is bypassed to suction side so that suction side liquid refrigerant is heated to be overheated gas, ensure the suction superheat of compressor, it is ensured that its is safe and reliable to operation.
Description
Technical field
The present invention relates to a kind of control method of air-conditioning system, especially a kind of compressor for being adapted to multiple on-line system is protected
Maintaining method, specifically a kind of compressor protection method of multiple on-line system.
Background technology
At present, in multiple on-line system refrigerating operaton, often occur because coolant injection is excessive or system control is abnormal and
Compressor is caused to be burnt because returning liquid.For above mentioned problem, common control mode is：When finding that unit has back liquid, turn down
The aperture of indoor set valve, to reduce system band liquid measure.But such a method the problem of existing, is：Due to the company of most systems
Connect that pipe arrangement is longer, make this regulative mode that there is certain hysteresis quality, control effect is poor.Meanwhile the aperture of indoor set is adjusted,
The reduction of user's comfortableness can be caused.
The content of the invention
The purpose of the present invention is for current multiple on-line system in use, the problem of existing compressor lacks protection, carries
For a kind of compressor protection method of multiple on-line system, compressor can be ensured on the premise of indoor set aperture is not changed
Suction superheat, it is ensured that its is safe and reliable to operation.
The technical scheme is that：
A kind of compressor protection method of multiple on-line system, including an outdoor unit and multiple indoor sets, wherein, outdoor unit
Including compressor, oil eliminator, four-way valve and the gas-liquid separator being sequentially connected；Each indoor set include heat exchanger and and its
The electric expansion valve of series connection.The outdoor unit also includes magnetic valve, pressure sensor and temperature sensor, and the one of the magnetic valve
End is connected on the pipeline between oil eliminator and four-way valve, and the other end is connected to the pipeline between gas-liquid separator and compressor
On；The pressure sensor and temperature sensor are on the pipeline between compressor and oil eliminator；The guard method
Comprise the following steps：
1）The delivery temperature T1 and pressure at expulsion P0 of detection compressor in real time, and make saturation temperature corresponding to P0 be T0；
2）Discharge superheat T3=T1-T0 of real-time computer group；
3）After unit refrigerating operaton S1min, start to judge the size of T3 values；
4）Work as T3<5 DEG C, and after continuing S2min, opens solenoid valve；
5）Work as T3>15 DEG C, and close magnetic valve after continuing S3min.
Further, described S1 values are 5 ~ 15min.
Further, described S2 values are 0.5 ~ 3min.
Further, described S3 values are 0.5 ~ 3min.
Beneficial effects of the present invention：
The present invention is reasonable in design, simple in construction, easy to control, can ensure on the premise of indoor set aperture is not changed
The suction superheat of compressor, it is ensured that its safe and reliable operation.Thus, the service life of compressor can not only be extended, and
It can also keep the comfort of user unaffected.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Wherein：1- compressors；2- oil eliminators；3- four-way valves；4- condensers；The main electric expansion valves of 5-；6- electronic expansions
Valve；7- heat exchangers；8- pressure sensors；9- temperature sensors；10- gas-liquid separators；11- magnetic valves.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1.
A kind of multiple on-line system, including an outdoor unit and two indoor sets parallel with one another.Wherein, each indoor set is equal
Including electric expansion valve 6 and heat exchanger 7, and the electric expansion valve 6 and heat exchanger 7 are in series.The outdoor unit includes compressor
1st, oil eliminator 2, four-way valve 3, condenser 4, main electric expansion valve 5, gas-liquid separator 10 and magnetic valve 11.Wherein, compressor 1
Refrigerant exit be connected to the refrigerant inlet of oil eliminator 2, the refrigerant exit of oil eliminator 2 is connected to the first of four-way valve 3 and connect
Mouthful.The second interface of four-way valve 3 is connected after condenser 4 and main electric expansion valve 5 with indoor set successively, the outlet of indoor set
It is connected on the 3rd interface of four-way valve 3.4th interface of four-way valve 3 is connected to entering for compressor 1 after gas-liquid separator 10
Mouthful.Described one end of magnetic valve 11 is connected on the pipeline between oil eliminator 2 and four-way valve 3, and the other end is connected to gas-liquid point
From on the pipeline between device 10 and compressor 1, the described bottom of oil eliminator 2 is connected to the entrance pipe of gas-liquid separator 10
On, the high-temperature gas come out by the outlet of compressor can be passed through to the import that the pipeline flow back to compressor.Described compressor 1 with
Pressure sensor 12 and temperature sensor 13 are there is also mounted on pipeline between oil eliminator 2, wherein, pressure sensor 12 is used for
The pressure at expulsion P0 of unit is detected, temperature sensor 13 is used for the delivery temperature T1 for detecting unit.
Compressor protection method applied to above-mentioned multiple on-line system comprises the following steps：
1）The delivery temperature T1 and pressure at expulsion P0 of detection compressor in real time, and make saturation temperature corresponding to P0 be T0；
2）Discharge superheat T3=T1-T0 of real-time computer group；
3）After unit refrigerating operaton S1min, start to judge the size of T3 values；
4）Work as T3<5 DEG C, and after continuing S2min, opens solenoid valve；
5）Work as T3>15 DEG C, and close magnetic valve after continuing S3min.
Described S1 values are 5 ~ 15min, it is preferred that described S1 values are 10min；
Described S2 values are 0.5 ~ 3min, it is preferred that described S3 values are 2min；
Described S3 values are 0.5 ~ 3min, it is preferred that described S3 values are 1min.
In unit refrigerating operaton, when discharge superheat is relatively low, that is, compressor air suction band liquid is thought.Pass through above-mentioned inspection
Survey and judgment step, open magnetic valve, the high-temperature gas of compressor air-discharging side are bypassed to suction side so that air-breathing
Side liquid refrigerant is heated to be overheated gas, ensures the suction superheat of compressor, improves the reliability of unit operation.Together
When, because above-mentioned guard method is not related to the regulation of indoor set, the influence to indoor refrigeration is reduced, makes that user's is comfortable
Property is guaranteed.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (4)
1. a kind of compressor protection method of multiple on-line system, including an outdoor unit and multiple indoor sets, wherein, outdoor unit bag
Include the compressor being sequentially connected, oil eliminator, four-way valve and gas-liquid separator；Each indoor set includes heat exchanger and gone here and there with it
The electric expansion valve of connection, it is characterized in that the outdoor unit also includes magnetic valve, pressure sensor and temperature sensor, the electromagnetism
One end of valve is connected on the pipeline between oil eliminator and four-way valve, and the other end is connected between gas-liquid separator and compressor
Pipeline on；The pressure sensor and temperature sensor are on the pipeline between compressor and oil eliminator；The guarantor
Maintaining method comprises the following steps：
1）The delivery temperature T1 and pressure at expulsion P0 of detection compressor in real time, and make saturation temperature corresponding to P0 be T0；
2）Discharge superheat T3=T1-T0 of real-time computer group；
3）After unit refrigerating operaton S1min, start to judge the size of T3 values；
4）Work as T3<5 DEG C, and after continuing S2min, opens solenoid valve；
5）Work as T3>15 DEG C, and close magnetic valve after continuing S3min.
2. the compressor protection method of multiple on-line system according to claim 1, it is characterized in that described S1 values be 5 ~
15min。
3. the compressor protection method of multiple on-line system according to claim 1, it is characterized in that described S2 values are 0.5
~3min。
4. the compressor protection method of multiple on-line system according to claim 1, it is characterized in that described S3 values are 0.5
~3min。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510754210.4A CN105333660B (en) | 2015-11-09 | 2015-11-09 | A kind of compressor protection method of multiple on-line system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510754210.4A CN105333660B (en) | 2015-11-09 | 2015-11-09 | A kind of compressor protection method of multiple on-line system |
Publications (2)
| Publication Number | Publication Date |
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| CN105333660A CN105333660A (en) | 2016-02-17 |
| CN105333660B true CN105333660B (en) | 2018-02-06 |
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| CN201510754210.4A Active CN105333660B (en) | 2015-11-09 | 2015-11-09 | A kind of compressor protection method of multiple on-line system |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105928277B (en) * | 2016-05-06 | 2019-02-15 | 广东美的暖通设备有限公司 | A kind of air-conditioning Liquid injection cooling electromagnetic valve control method, system and air-conditioning |
| CN107152820B (en) * | 2017-06-19 | 2020-05-29 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN107843023A (en) * | 2017-10-17 | 2018-03-27 | 天津城建大学 | A kind of refrigerating machine device |
| CN109405383B (en) * | 2018-10-29 | 2020-08-18 | 宁波奥克斯电气股份有限公司 | Air conditioner liquid return prevention control method and air conditioner |
| CN110173831A (en) * | 2019-05-20 | 2019-08-27 | 广东美的制冷设备有限公司 | The control method of air conditioner and air conditioner |
| CN110160207A (en) * | 2019-05-20 | 2019-08-23 | 广东美的制冷设备有限公司 | The control method of air conditioner and air conditioner |
| CN111174457A (en) * | 2020-01-06 | 2020-05-19 | 珠海格力电器股份有限公司 | Air conditioning system capable of preventing operation with liquid and control method |
| CN111207502B (en) * | 2020-01-17 | 2021-06-15 | 广东美的暖通设备有限公司 | Operation control method, operation control device, air conditioning system, and storage medium |
| CN114427700B (en) * | 2022-01-26 | 2023-06-20 | 宁波奥克斯电气股份有限公司 | Multi-split system and oil return control method thereof |
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| CN103196202A (en) * | 2012-01-09 | 2013-07-10 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
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| CN104676845A (en) * | 2015-03-26 | 2015-06-03 | 广东美的暖通设备有限公司 | Multi-split system and control method thereof |
| CN104949407A (en) * | 2015-06-12 | 2015-09-30 | 珠海格力电器股份有限公司 | Oil separator component, refrigerating system and control method of refrigerating system |
| CN104964343A (en) * | 2015-06-12 | 2015-10-07 | 广东美的暖通设备有限公司 | Device and method for improving running reliability of compressor |
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| JP2006234239A (en) * | 2005-02-23 | 2006-09-07 | Mitsubishi Heavy Ind Ltd | Accumulator liquid refrigerant detecting method for air conditioning system, receiver liquid refrigerant detecting method, refrigerant amount adjusting method and air conditioning system |
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| CN105333660A (en) | 2016-02-17 |
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